IPMN-P is an well established pancreatic neoplasm with a better prognosis...so may have a biliary counterpart !!
Contrary to well-documented flat type neoplasms, biliary
papillomatosis or intraductal papillary mucinous neoplasmbilliary
type (IPMN-B) is relatively rare and a recently diagnosed
disease entity. Papillary neoplasm of the bile ducts are
rare, pathology is characterized by diffuse papillary proliferation
of the bile duct epithelial cells. They account for 3-5%
of cholangiocarcinomas and can arise from any portion of
the intra or extra hepatic bile ducts. Biliary intraductal
neoplasms are proposed to be of two types: flat and papillary. Papillary cholangiocarcinoma is believed to have a better
clinical course than non-papillary cholangiocarcinoma, just
as malignant intraductal papillary mucinous neoplasm of the
pancreas (IPMN-P) has a better prognosis than pancreatic
ductal adenocarcinoma.
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